Chip swap issues

[Antrieb]

Call up Mark and see if they accidently sent you the wrong chip.

[billb]

Call up Mark and see if they accidently sent you the wrong chip.

He was running the EAT just fine. This is my EAT chip (?) that I was letting him borrow. It was running fine on his stock chip before the EAT, then running fine on the EAT. It's just when he reinstalled the stock chip that it won't run...